Collapsible core



E. M. McCURRY AND G. R. BILGER.

COLLAPSIBLE CORE,

APPLICATION FILED mAYal, 1919.

Patented Jan 18, 1921.

(92 M4 fa /2M UNITED STATES PATENT OFFICE EARL M. MOCURRY AND GEORGE R.BILGER, OF COLUMBIANA, OHIO, ASSIGNORS TO THE BANNER MACHINE COMPANY, OFCOLUMBIANA, OHIO, A CORPORATION OF OHIO.

COLLAPSIBLE CORE.

Application filed May 31,

To all whom it may concern Be it known that we, EARL M. MGCURRY andGnonon R. BILGER, citizens of the United States, residing at Columbiana,in the county of (lolumbiana and State of Ohio, have invented a new anduseful Collapsible Core, of which the following is a specification.

This invention relatesto improvements in collapsible cores and mandrels,such as are used for building and vulcanizing tire casings.

The objects of the invention are to provide a collapsible core which maybe quickly and easily assembled or knocked down and which when soassembled will be held firmly together, positive clamping means beingprovided for holding the separable sections together, frictional contactbetween the core sections and the clamping ring not being relied upon.

A further object is the provision of a simple, durable and efficientcollapsible core and the invention also aims to generally improvedevices of this character so as to render them more useful andcommercially desirable.

lVith these objects in view the invention consists in the novelconstruction and arrangement of parts, hereinafter described,illustrated in the accompanying drawings, and particularly pointed outin the append- 'cd claim, it being understood that various changes inthe form, proportions, size and minor details of construction may bemade within the scope of the appended claim, without departing from thespirit or sacrificing any of the advantages of the invention.

The invention thus set forth in general terms illustrated in theaccompanying drawings forming part hereof, in which Figure l is a sideelevation of the as sembled core; and

Fig. 2 a section on an enlarged scale taken on a radial line through.one of the studs.

A practical embodiment of the invention is disclosed in the accompanyingdrawings, forming a part of this specification in which similar numeralsof reference indicate corresponding parts throughout the several views.

The core embodying the invention comprises an annulus formed of aplurality of Specification of Letters Patent.

Patented J an.-18, 1921.

1919. Serial No. 301,133-

separable sections 1, each section comprising a body portion 2substantially circular in cross section, and an inwardly extendingflange 3 having an enlarged shouldered portion 4.

Each of the sections 1 of the annulus is provided upon its inner edgeand near each end with a screw threaded stud 5, thus prosigned toreceive the annular flange 7 of the,

ring 8, said ring fitting snugly within the lnterior of the annulus, 1tbeing understood however that there 18 not a frictional contact betweenthe ring and the annulus, ex

cepting when the clamping nuts are adjusted as will be later described.

This ring is provided with a plurality of slots 9 arranged to receivethe threaded studs 5 when the ring is placed in position within theannulus. In assembling the core the several sections of the annulus areplaced together and the ring 8 inserted as shown in the drawings afterwhich the clamping nuts 10, provided upon the threaded studs 5, aretightened, drawing the several sections of the annulus tightly againsteach other and against the periphery of the ring 8, thus locking theseveral sections of the annulus firmly together upon the ring.

lVhenit is desired to remove the core from the tire the ring may bereadily removed hy loosening the clamping nuts 10, after which the ringlifted out of the annulus allmving the core sections to be collapsed inthe usual manner.

It will. thus be seen that a very durable, eflicient and simplecollapsible core is pro vided wherein the parts are so arranged andformed that the operation of the assembling and knocking down, the coremay be easily effected and the core sections positively held in firmrelation to each other and to the rim when in the assembled condition.

Although the drawings and above specification disclose the best mode inwhich we have contemplated embodying our invention We desire to be notlimited in the details of such disclosure, for, in the further practicalapplication of our invention, many changes in form and construction maybe made, as circumstances require or experience suggests, Withoutdeparting from the spirit of the invention, Within the scope of theappended claim.

V e claim:

A core of the character described, C0111- prising an annulus formed of aplurality of sections having an annular recess at one inner edge, anannular ring adapted to be located entirely within said annulus andhaving an annular shoulder around one edge of its periphery arranged toengage said annular recess, and provided with radial notches, radialstuds carried upon said sections and arranged to be received within saidnotches and means upon said studs for drawing the sections toward thecenter of the annulus.

In testimony that we claim the above, we have hereunto subscribed ournames.

EARL M. MCCURRY. GEORGE R. BILGER.

